Soluzioni - Software Open Source
izBalancing :: Multihomed network loadbalancer
izBalancing is a GNU/Linux firewall/router bash script featuring in/out multihomed loadbalanced internet gateway traffic with failover facilityKey Features:
- Multiple balanced default gateway configuration
- Load Balanced outgoing connections from LAN to INTERNET connections
- Management of multiple incoming connection from many INTERNET ISP lines to DMZ/LAN Servers
- SystemV compliant script... you can run easly at boot up (like Red Hat, Fedora, SuSE, Mandrake, etc...)
- Automatically discover your local IP addresses... you can change your IP without reconfigure this script, just restart
- Start and Stop cleanly your multihomed configuration with simple command (izbalancing start|stop|restart)
- Adding new internet connections is very fast and easy
- You must provide the interface name, router ip address and a descriptive name only
- If the izping daemon is installed into /etc/rc.d/init.d/ it will be used for automatic failover and recovery of internet lines
Requirements:
- GNU/Linux Firewall running Kernel >=2.6.10 (with iptables module CONNMARK available)
- Bash Shell >= 2.0
- Standard GNU/Linux coreutils utilities (cat, echo, grep, if, etc...)
- GNU Version of awk and sed utilities
- GNU/Linux Netfilter user space utilities (iptables >= 1.2.11)
- iproute2 utilities
- Two or more Internet connections (also from different ISPs and IP classes)
- An ethernet card for each ISP Router
Installation:
-
If using a Red Hat Linux based distribution, just copy the izbalancing script into /etc/rc./init.d/ and run:
chmod 755 /etc/rc./init.d/izbalancing
chkconfig izbalancing on
-
Configure or add the following variables into this script:
GATEWAYS="interface1:gatewayip1:name1 interface2:gatewayip2:name2 interface3:gatewayip3:name3"
BALANCED="name1 name2"
VERIFY_HOSTS="ip1 ip2 ip3"
FAILOVER_HOSTS="ip1 ip2 ip3"
- Comment out the iptables rules as you need
-
usable special variables created on demand using the order specified in the GATEWAYS variable:
$GWIFx = interface name (ex. GWIF1=eth1, GWIF2=eth2 so on...)
$GWIPx = gateway ip address (ex. GWIP1=10.1.1.1, GWIP2=10.1.2.1 so on...)
- If the izping daemon script is installed into /etc/rc./init.d/, izbalancing will use it to make automatic failover and recovery of internet lines, checking the ip addresses specified into VERIFY_HOSTS and FAILOVER_HOSTS variables